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(11) | EP 1 168 296 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Waveform signal generation method with pseudo low tone synthesis |
| (57) A method generates waveform signals from a plurality of channels to sound a music
tone through an electro-acoustic converter in response to sounding instruction information.
The method is carried out by a receipt process of receiving the sounding instruction
information containing a designated pitch effective to specify a pitch of the music
tone, a determination process of determining whether or not the designated pitch is
lower than a critical pitch which is predetermined in association with the electro-acoustic
converter, a first generation process (36) of generating a first waveform signal (38)
containing a fundamental tone corresponding to the designated pitch at least when
the determination process determines that the designated pitch is not lower than the
critical pitch (50), and a second generation process (60) of generating a second waveform
signal (52) containing at least two overtones which are multiples of the fundamental
tone and higher than the critical pitch (50), only when the determination process
determines that the designated pitch is lower than the critical pitch (50), thereby
the second waveform signal (52) providing a pseudo low tone below the critical pitch. |